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Power compensator and method for providing a black start with that compensator

a technology of power compensation and black start, which is applied in the integration of power network operation systems, emergency power supply arrangements, pulse techniques, etc., can solve the problems of short circuit failure mode, inability to provide auxiliary power from these solutions, and difficulty in starting up voltage source converters connected to dead networks. achieve the effect of saving power consumption

Active Publication Date: 2009-12-17
HITACHI ENERGY SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0035]According to an embodiment of the invention there is arranged on each galvanically isolated battery unit a communication module. The module comprises radio communication means, power supply and a plurality of sensing transducers. Also the communication module is galvanically isolated and thus achieving the same potential as the battery unit. The module may communicate within a wireless local area network, such as a WLAN or a Bluetooth network. The sensed values, such as voltage, current and temperature are p

Problems solved by technology

The short circuit failure mode may be effected by the inner performance of the battery cell.
To start up a voltage source converter connected to a dead network is not an easy task.
In a dead network no auxiliary power can be provided from these solutions.

Method used

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  • Power compensator and method for providing a black start with that compensator
  • Power compensator and method for providing a black start with that compensator
  • Power compensator and method for providing a black start with that compensator

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Embodiment Construction

[0046]A principal circuit of a power compensator 1 connected via a transformer 2 to an electric power transmission line is shown in FIG. 1. The power compensator comprises a voltage source converter 4, a capacitor means 6 and an energy storage device 5. The voltage source converter comprises at least six selfcommutated semiconductor switches, each of which is shunted by a reverse parallel connected diode. The voltage source converter has an ac side connected to the transformer and a dc side connected to the capacitor means and the energy storage device.

[0047]The energy storage device comprises a plurality of series connected battery units 7. In the embodiment shown in FIG. 2 four battery units 7a-7d are arranged in a rack 8. Each battery unit has a positive terminal 9 and a negative terminal 10. In the embodiment shown each battery unit has a voltage of 1500 volts thus the energy storage device containing four batteries connected in series has a voltage level of 6 kV. However there ...

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Abstract

A power compensator for an electric power transmission line. The power compensator includes a voltage source converter, a capacitor and an energy storage device. The energy storage device includes a high voltage battery having a short circuit failure mode, a first main switch and second main switch for disconnecting the battery from the capacitor, and a control unit for operating the first and second switch.

Description

TECHNICAL FIELD[0001]The present invention concerns power compensation of a high voltage transmission line. By a transmission line should be understood a conductor for electric power transmission or distribution line within the range of 6 kV and upwards. Especially the invention concerns an apparatus for providing a rapid exchange of electric power on a high voltage transmission line. The apparatus comprises a voltage source converter (VSC) and an energy storage device. In particular the invention is related to a black start of a dead network.BACKGROUND OF THE INVENTION[0002]Within flexible alternating current transmission system (FACTS) a plurality of control apparatus are known. One such FACTS apparatus is a static compensator (STATCOM). A STATCOM comprises a voltage source converter (VSC) having an ac side connected to the transmission line and a dc side connected to a temporary electric power storage means such as capacitor means. In a STATCOM the voltage magnitude output is con...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/32
CPCH02J3/1842H02J3/32H02J9/062H02J13/0075Y02B70/3291Y02B90/222Y02E60/722Y02E40/74Y04S10/14Y04S10/22Y04S20/12Y04S20/248Y02E40/22H02J13/00017H02J13/00026Y02B70/30Y02B90/20Y02E40/20Y02E40/70Y02E60/00
Inventor ANGQUIST, LENNARTCALLAVIK, MAGNUSHERMANSSON, WILLYJOHANSSON, STEFANRUSSBERG, GUNNARSVENSSON, JAN R.
Owner HITACHI ENERGY SWITZERLAND AG
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